chore add --webpack-stats-json to storybook build

Author: danielroe

.github/workflows/chromatic.yml

@@ -32,7 +32,7 @@ jobs:
           cache: true
 
       - name: 🏗️ Build Storybook
-        run: vp run build-storybook
+        run: vp run build-storybook --webpack-stats-json
 
       - name: 🧪 Run Chromatic Visual and Accessibility Tests
         uses: chromaui/action@5ec258af08deb3e8c36653bd618cb7fe52090031 # v15.2.0